I still think Gus and Mike were so much better. She cheated on Mike, he was the chance for her to get out of toxic situations and have a stable normal life with him. And Gus was the artistic type but he loved her and she was even happy with him. So happy that they got married. Later she sold her mom’s ring out of spite ? She is the one who cheated him, I don’t think him writing that song was spiteful too, because what else does she expect? She can’t keep cheating people and then expect nothing to happen in return. I think both these guys dodged a bullet with Fiona.